Chickens mixing it up in my kitchen!

So my RIR Cornelia Marie has been living in my kitchen for two weeks, about a month after she had her second crop surgery. She is doing amazingly well! One of my other hens had poopy butt so I brought her in for a butt cleaning. I thought well, these two grew up together, maybe Frances and Cornelia could visit for a bit. So I let Frances out of the cat carrier and my recuperating surgical patient wanted to FIGHT with her! She was giving her chicken kicks and I had to separate them! Poor Frances. I guess Cornelia Marie thinks my kitchen is HER territory now and no interlopers will be tolerated. These girls today.....